Pipe-lifting jack



Nov., 20 1923.

' 1,475,146- J. w. SEPTER I PIPE LIFTING JACK Filed April 25, 1921 I J. Ma g /7W.

\ BY My of Kansas,

Patented New. 6, 1923.

JAMES w. serum, or sun or, KANSAS.

' PIPE-LIFTING JACK.

To all whom it may concern:

, Be it known that I, JAMES W. SEPTER, a citizen of the United States, residin at Sun City, in the county of Barber and S tate have invented new and useful Improvements in Pipe-Lifting Jacks, of which the following is a specification.

This invention relates .to lifting devices, particularly to jacks, and has for its object the provision of a novel jack device or antomatic clamp designed primarily for pulling or lifting pipe sections out of a well,

the device being so constructed that when allowed to drop down along a line it will ings, to be pulled. In carrying out my invention pass over units thereon but being so constructed that when an upward pull is exerted thereon by a rope or other flexible member'from which it is suspended, the device -will automatically grip the pipe, the gripping action being all the more positive as the strain is placed upon the rope.

An important object is the provision of a device of this character which is adaptable for use upon pipes of different sizes, the de vice automatically accommodating itself to the pipe regardless of the diameter of the latter,'of course within reasonable limits.

An additional object is the provision of a device of this character which will be simple and inexpensive in construction, highly efiicient in use, positive in action, durable in service, and a general improvement in the ant.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which- Figure 1 associated with a pipe leased position,

Figure 2 is asimilar-view showing the deand in initial or revice in gripping position,

Figure 3 is a cross sectional view through the pipe showing my device in plan,

Fi re 4 is a perspective view of one of the c amping jaws, an

Fi re 5 is a sectional view through a modified form of clamping jaws.

Referring more particularly to the drawthe letter A designates a pipe section formed of two similar memwhich includes a semi:cir-

11 and stralght I provide a yoke here 10, each of cular intermediate portion isa side elevation of my device.

Application filed April 2591921. Serial No. 464,171.

end portions 12 and 13." These members 10 v are placed together in mating relation and aredesigned to be slipped over the pipe to be elevated. "The end portions 13 are considerabLy longer than the end portions 12' whereby to constitute levers and having their extremities formed with holes 14.

Pivoted between the ends 12 is a jaw 15 and pivoted between the ends 13 is a similar jaw 16. These jaws may be formed as shown in Figure 4 which shows the jaws as formed from a preferably rectangular block 17 of elongated form having a toothed pipe engaging. face 18. If preferred, the jaws might be straight as shown in Figure 5, in which figure they are shown as having curved pipe engaging faces 19. Regardless of which form of jaw is used, the operation is the same.

' In the use of the device it is placed upon the pipe to be lifted and is of course connected as by a ring 20 with a rope or other flexible member 21 by means of which the device may be lowered into the Well or other place whereby the pipe is located. When the device is allowed to drop along the pipe it will be seen that it will have no action and will, moreover, am freely over units. When the device has sired point pull upwardly on the rope 21, the jaws will of course be opposite sides of the pipe, as shown in Fi ure 2 and will efficiently grip the pipe. s the operator continues to pull upon the rope 21 it willbe quite apparent that the pipe section will be lifted.

From the fore oing description and a study of the drawings it will be seen that I have thus provided a pipe lifting jack of extremely simple form and one which will therefore be inexpensive. It will be observed that the gripping: action is entirely automatic and that the strength of the grip is directly in proportion to the degree of pull upon the hoisting rope.

While I have shown and described the preferred embodiment of my invention, it is of course to be understood that I reserve the right to make such changes in the form, construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described my.invention, I claim:

1. A pipe jack comprising a yoke disposbeen lowered to the deand the operator exerts a slight brought into engagement with lid eble about a pipe and having one end prolonged to serve as a lever adapted for connection with a flexible hoisting element, and a pair of fans pivoted within the yoke and engageable with opposite sides of a pipe to be pulled, said jaws having their confronting faces formed with inclined teeth.

2. A pipe jack comprising a pair of memhers each including a semi-circular intermediate portion and straight end portion, the

members mating to form a yoke disposable in encircling relation to a one end of the yoke being prolonged to define a lever handle, a flexible member connected with prolonged end, and a pair of similar gripping jaws pivoted between pipe to be pulled,

emme the respective ends of said members and engageable with opposite sides of the pipe to be pulled.

3. A pipe jack comprising a pair of members each including a semi-circular intermediate portion and straight end portions, said members mating to form a yoke disposable in encircling relation to a pipe to be pulled, one end of the yoke being prolonged to define a lever handle, and a pair of similar gripping jaws pivoted between the respective straight end portions and cngageable with opposite sides of the pipe to be pulled.

In testimony'whereofl afiix my signature.

JAMES W. SEPTER. 

